Emission Controls
PGM-FI System
The PGM-FI System on your car has
three subsystems: Air Intake,
Electronic Control, and Fuel Control.
The Electronic Control Unit (ECU)
uses various sensors to determine
how much air is going into the
engine. It then controls how much
fuel to inject under all operating con-
ditions.
Ignition Timing Control System
This system constantly adjusts the
ignition timing, reducing the amount
of HC and NOx produced.
Exhaust Gas Recirculation (EGR)
The EGR system takes some of the
exhaust gas and routes it back into
the intake manifold. Adding the ex-
haust gas to air/fuel mixture re-
duces the amount of NOx produced
when the fuel is burned.
Catalytic Converter
The catalytic converter is in the
exhaust system. Through chemical
reactions, it converts HC, CO, and
NOx in the engine's exhaust to
carbon dioxide (CO
2
), dinitrogen
(N
2
), and water vapor.
Replacement Parts
The emission control systems are
designed and certified to work
together in reducing emissions to
levels that comply with the Clean Air
Act. To make sure the emissions
remain low, you should use only new
genuine Honda replacement parts or
their equivalent for repairs. Using
lower quality parts may increase the
emissions from your car.
The emissions control systems are
covered by warranties separate from
the rest of your car. Read your
warranty manual for more informa-
tion.
Technical Information
